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| Metal Detectors |
Metal detectors are devices that use electromagnetic fields to detect and signal the presence of metallic or ferromagnetic objects. Metal detectors vary in their effective operating ranges and the amounts and types of metals necessary to generate a signal. They may be fixed, as in the familiar airport walk-through detectors, or hand-held and portable. Uses include sport (finding coins, jewellery and artefacts), prospecting, industrial and security.
Different metals have different resistance levels to electricity. Also some conduct electricity better than others. Copper, for example, is an excellent conductor of electricity. Lead is a poor conductor. So the resistance to conducting electricity affects the magnetic field as does the depth of the article. The deeper it is the longer it takes to affect the magnetic field. |
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- Single Zone Door Frame Metal Detector
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- Multi Zone Door Frame Metal Detector
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